Troubleshooting Guide - Renfert basic quattro Mode D'emploi

13. Troubleshooting Guide

Problem Possible cause
No air and no • Blasting nozzle blocked at the
abrasive.
• Foot switch connecting lines
• Switch set to an intermediate
Only air, no or very • Metering nozzle (centre
little abrasive.
• Mixing chamber fi lter
• Abrasive contains impurities or
Unit blasts • Foot switch connected
continuously.
• Valve in foot switch is
Lamp does not go
• Power cord not plugged in.
on.
• Fluorescent tube defective.
• Faulty electronics.
• Fluorescent tube not properly
Compressed air • Pneumatic hoses reversed.
leaking from the
foot switch.
Foot switch fails to • No pressure at the
switch on.
• Pneumatic hoses are kinked.
Foot switch • Push-in connection is not
hoses cannot be
disconnected from
the unit.
hand-piece.
kinked.
position.
nozzle) blocked at the tank.
combination blocked.
is moist.
incorrectly.
defective.
seated in the socket.
compressed air connection.
released (Fig. 2).
Corrective action
• Unscrew the nozzle from the hand-piece and blow it out.
• With the nozzle removed, blow out the blasting hose by
activating the foot pedal.
• Inspect/correct the connection lines.
• Turn the switch until you feel it click into place.
• Unscrew the tank cover.
• Seal the top of the riser pipe (blue hose) with a piece of
insulation or Sello tape.
• Reinstall the cover.
• Hold your fi nger over the nozzle on the hand-piece and
repeatedly activate the foot switch.
• Unscrew the tank cover and remove the tape from the riser
pipe. Reinstall the cover and continue normal sandblasting.
Install new fi lter sets:
à Part no. 90002-8889
à Part no. 90002-8888
(Refer to the insert for the appropriate fi lter set):
• Disconnect the compressed air supply to the mixing chamber.
• Unscrew the plug-in connection.
• Remove the old fi lter sets.
• Run a thin (1 mm) wire through the opening in the mixing
chamber.
• Install new fi lter sets as follows (number of components
according to the fi lter set– smooth (colour marked) side facing
the mixing chamber):
1. Screen
2. Filter, thin
3. Filter, thick
4. Screen
5. Spacer
Reinstall the screw-on connections in the reverse order.
Make certain their is no abrasive residue on the threads.
Attention: Never operate the unit without fi lters!
Do not reinstall used fi lter sets!
• Replace the abrasive.
• Inspect/correct the foot switch connection.
• Replace foot switch.
• Plug the power cord into the wall outlet.
• Replace the fl uorescent tube (refer to Sec. 5.6).
• Call for service to replace the electronics, or refer to the spare
parts list.
• Refer to Sec. 4.2, "Fluorescent Lamp Installation".
• Reverse the connections.
• Inspect the compressed air lines and/or the compressor.
• Reposition the hoses.
• Press the push-in connection ring on the hose side fi rmly while
pulling on the hoses.
25-70 µm
70-500 µm
Subject to modifi cation.